| NCIA | National Cannabis Industry Association 
| Others |
| NCIA | National Center on Institutions and Alternatives
| Others |
| NCIA | National Copyright Industry Alliance
| Others |
| NCIA | National Correctional Industries Association
| Others |
| NCIA | National Council of Instructional Administrators
| Others |
| NCIA | Native Client Interface Architecture
| Others |
| NCIA | NATO Communications and Information Agency
| Others |
| NCIA | Natrona County International Airport
| Others |
| NCIA | Nebraska Commission on Indian Affairs
| Others |
| NCIA | Nebraska Crop Improvement Association
| Others |
| NCIA | Nevada Collision Industry Association
| Others |
| NCIA | North Carolina Investment Advisory
| Others |
| NCIA | Northern Corridor Implementation Authority
| Others |